pdf

gistfile1.txt

class PdfViewer extends ConsumerStatefulWidget {
  const PdfViewer({
    super.key,
    this.filePath,
    this.fileUrl,
  });

  final String? filePath;
  final String? fileUrl;

  @override
  ConsumerState createState() => _PdfViewerState();

  /// Show from URL (download + cache)
  static Future<dynamic> showFromUrl({
    required BuildContext context,
    required String url,
  }) {
    return showGeneralDialog(
      context: context,
      transitionDuration: const Duration(milliseconds: 0),
      pageBuilder: (context, __, ___) {
        return PdfViewer(fileUrl: url);
      },
    );
  }

  /// Show from local file path
  static Future<dynamic> showFromFile({
    required BuildContext context,
    required String path,
  }) {
    return showGeneralDialog(
      context: context,
      transitionDuration: const Duration(milliseconds: 0),
      pageBuilder: (context, __, ___) {
        return PdfViewer(filePath: path);
      },
    );
  }
}

class _PdfViewerState extends ConsumerState<PdfViewer> {
  int _currentPage = 0;
  int _totalPages = 0;
  String? _filePath;
  bool _isLoading = false;

  @override
  void initState() {
    super.initState();

    if (widget.filePath != null) {
      // Local file → no loading
      _filePath = widget.filePath;
    } else if (widget.fileUrl != null) {
      // Remote file → show loader until cached
      _isLoading = true;
      DefaultCacheManager().getSingleFile(widget.fileUrl!).then((file) {
        if (mounted) {
          setState(() {
            _filePath = file.path;
            _isLoading = false;
          });
        }
      }).catchError((e) {
        debugPrint("Failed to load PDF: $e");
        if (mounted) {
          setState(() {
            _isLoading = false;
          });
        }
      });
    }

    ScreenRotationUtils.enableRotation();
  }

  @override
  Widget build(BuildContext context) {
    final falconVars = FalconUxVariables(context);
    final fileName = (_filePath ?? widget.fileUrl ?? '').split('/').last;

    return Scaffold(
      appBar: MobileTopHeader(
        leadingAction: IconButton(
          style: falconVars.mediumIconBtn,
          icon: FaIcon(
            const IconDataLight(FA.chevronLeft),
            size: falconVars.size20,
            color: falconVars.onSurface,
          ),
          onPressed: () => Navigator.pop(context),
        ),
        titleWidget: Expanded(
          child: Text(
            fileName,
            maxLines: 1,
            style:
                falconVars.headlineLarge.copyWith(fontWeight: FontWeight.w700),
            overflow: TextOverflow.ellipsis,
          ),
        ),
        secondaryActions: [
          if (_filePath != null)
            IconButton(
              style: falconVars.mediumIconBtn,
              icon: FaIcon(
                const IconDataLight(FA.shareNodes),
                size: falconVars.size20,
                color: falconVars.onSurface,
              ),
              onPressed: () {
                ShareUtil.sharePDF(_filePath!, fileName);
              },
            ),
        ],
      ),
      body: Stack(
        children: [
          if (_filePath != null)
            PDFView(
              filePath: _filePath,
              enableSwipe: true,
              swipeHorizontal: true,
              onPageChanged: (int? page, int? total) {
                setState(() {
                  _currentPage = (page ?? 0) + 1;
                  _totalPages = total ?? _totalPages;
                });
              },
              onRender: (pages) {
                setState(() {
                  _totalPages = pages ?? _totalPages;
                  _currentPage = pages != null ? 1 : _currentPage;
                });
              },
            ),
          if (_filePath != null)
            Positioned(
              bottom: 16,
              left: 0,
              right: 0,
              child: Center(
                child: Text('$_currentPage / $_totalPages Pages'),
              ),
            ),
          if (_isLoading)
            const Positioned.fill(
              child: Center(
                child: SizedBox(
                  width: 20,
                  height: 20,
                  child: CircularProgressIndicator(strokeWidth: 1),
                ),
              ),
            ),
        ],
      ),
    );
  }

  @override
  void dispose() {
    ScreenRotationUtils.disableRotation();
    super.dispose();
  }
}